From Citizendium, the Citizens' Compendium
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- Technical Resource Document: Extraction and Beneficiation of Ores and Minerals: Gold From the website of the U.S. Environmental Protection Agency (EPA)
- Use of Cyanide in the Gold Industry
- WebElements.com - Gold
- Mineral Galleries - Native Gold
- Los Alamos National Laboratory - Gold
- Virtual Chembook - Gold Processing Dr. Charles Ophardt, Emeritus Professor, Elmhurst College, Elmhurst, Illinois